You really won't benefit from the 4:88s unless you are running 35"-37" tires as they are to lower gear ratio to compensate for the larger diameter tires...that's is unless you are looking for more bottom end for something like drag racing then you may want them but as a daily driver your mileage will suffer withbthe smaller tires and low gears....the auburn posi is for just that reason...a mechanical posi traction unit to make your truck hook up better and put power to ground...unlike our electronic controlled stuff that is good but not great... Hope this helps but don't waste your money unless you have the lift and big tires....only reason I did it is I want taller tires and even though this truck is a beast...I know I will not be happy with the power or mileage when I go bigger on tires.....just as an example I had a chevy HD 2500 6.0 and no matter how I drove or what I towed, highway or city, I got 13.5 mpg.....lifted and 325/60-20s and put in 4.88s, stock were 4.10s, and truck felt like it pulled and ran better and actually went up to 14.5mpg....not a huge mileage improvement but keeping all my power to tow car trailers etc was worth it....but I will say it was less than 1000$ installed on the chevy.....gotta pay the tundra tax I guess lol...
The Tundra tax makes it a tough sell. I regeared my old Wrangler with Yukon gears for around $800 with Timken master install kits. I keep wanting to regear my truck but even if I were to gain 2 mpg and driving 30k/ year it would take forever to break even on $2k. I guess in fairness that would be adding Auburn too though because I couldn't resist if I were doing it.
Shenegar are you installing your own gears? You have a shop in Bluefield right?
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.